JS strings vs concat method

Question

I have some experience with Java and I know that strings concatenation with     operator produces new object    I d like to know how to do it in JS in the best way  what is the best practice for it

User · Answer

We can t concatenate a string variable to an integer variable using concat   function because this function only applies to a string  not on a integer  but we can concatenate a string to a number integer  using   operator  As we know  functions are pretty slower than operators  functions needs to pass values to the predefined functions and need to gather the results of the functions  which is slower than doing operations using operators because operators performs operations in-line but  functions used to jump to appropriate memory locations    So  As mentioned in previous answers the other difference is obviously the speed of operation     x000D   x000D   lt  DOCTYPE html gt  x000D   lt html gt  x000D   lt body gt  x000D   x000D   lt p gt The concat   method joins two or more strings lt  p gt  x000D   x000D   x000D   lt p id  demo  gt  lt  p gt  x000D   lt p id  demo1  gt  lt  p gt  x000D   x000D   lt script gt  x000D  var text1   4  x000D  var text2    World    x000D  document getElementById  demo   innerHTML   text1   text2  x000D    Below Line can t produce result x000D  document getElementById  demo1   innerHTML   text1 concat text2   x000D   lt  script gt  x000D   lt p gt  lt strong gt The Concat   method can t concatenate a string with a integer  lt  strong gt  lt  p gt  x000D   lt  body gt  x000D   lt  html gt  x000D   x000D   x000D

User · Answer

You can try with this code  Same case   chaine1   chaine2     I suggest you also  I prefer this  the string concat method

User · Answer

MDN has the following to say about string concat        It is strongly recommended to use the string concatenation operators           instead of this method for perfomance reasons   Also see the link by  Bergi

User · Answer

In JS      concatenation works by creating a new String object   For example  with     var s    Hello        we have one object s   Next   s   s     World     Now  s is a new object   2nd method  String prototype concat

User · Answer

There was a time when adding strings into an array and finalising the string by using join was the fastest best method  These days browsers have highly optimised string routines and it is recommended that   and    methods are fastest best

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